The Hypocritic Oath

Senator McConnell says Judge Sotomayor lacks the objectivity he wants in a justice. He says he is worried that her opinions would shape rulings from the bench.  Senator McConnell lacked objectivity by bashing her record before she got to the hearings. 

How does he get away with hypocrisy.  Do GOP lawmakers need to take the Hypocritic Oath in order to serve?